1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbda4678044f45c37ca7b103689d345b5143c02af4d18c713d46733559890fac. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/105fd0ee-e57c-466a-a8dd-18b5b996b28d.json and https://artists.proofprofile.net/proofs/artist/105fd0ee-e57c-466a-a8dd-18b5b996b28d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee131901d03f916f4d2273231dd1e76f399e7b29c3fff2f1f3a914db5a7590fc. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEIW12200272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6995f76b413c911a67963a2c5c3da99d388b4ddbcb28a8e5196d574d9094a06. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USLD91735975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1aebaa4e4132803c9e9fde72bdc6b2c2669e3c5cb895f8166f334a8f3e3e5e. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEIW12200469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ba4cf20d0c92a71b4ac7ba8e4758ee210dc42f5ff842168a0798bc17ca0206. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLUW22302272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cb8d276d8902faf6ad38399b389367bd768ff0a3415c603bc0268ca7ac906b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2201056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68276cab911e11463b91225bafef214ebf032805dbe862679bde81cf9b2e1cde. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2102062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4f24d3ba5f68076d033bfd6eddca6e576cc6f5e3c5a4fe40d2953eea953f90. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2102063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786eeb6d7e626a82633253126e649ccb1efd941a4dd09186b14a6f95dd13bc73. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2102064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7bb22e7200e6d438f197e4726ef5e84b5ead312824ba708a81fa09c4e0c6b9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2400325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee58914aa8f7823a7b1b49d16be21ff83da351773b8d8cd05dbd509266f61cb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6035dd10345501855b1fbbee9ff3b4a1736101d4809cd19f11abc39df3074e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BEIW12300142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff194b8fb9932c22f89f42572894ad832b81c62daaebe30011cf83c7181790d6. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2200164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412453d885db210182964ce00efe274f627c730057941423c301add3d44435ff. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NL5UG2200039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb892a6a2dbe02e92b1a07931dfd04fff41d03166ae35bcd30eea3dad9c2e61. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2200122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94252133cbb2f433f5ea5442734aa61e48b445e8fc411ae953a4ddff17ef22c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2101378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141ac5f6f327ce9f09753dc4f409329680f48025fac6c73af8804506016698eb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBLV62100814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce00dbc0881ced76baca7a931897e6e25b569bd2c739f22941241b7c7049fbda. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989376de7eebac58ae56091ab6759027eb649d4dbe934a354c88ec0af5904cb2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEWW42000586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d044f69ff3e70ff7fdc7dc6a4246a2c0338605694ff11e6bc6b611591c2bf15. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D1900694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec329cd64085f23cd84c4ecea42e10ca39058e06d9d5e1a8273e9edaa4ad17a3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLZ8V1800128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde17bd698cb2409977bdd085b939f315d88dd7a93c1f26b31b40cd4c8ae707c4. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBSMU6679374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e78d1a683efba00761b918c8067f2facb6e3204e9fc3e7a1f3a157c7ba52f1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLQ8D2201449.